Resistor composition and thick film resistor
US7476342B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2006 |
| Grant date | Jan 13, 2009 |
| Priority date | — |
| Expiry date | Jan 10, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C17/06533
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A resistor composition containing: a lead-free ruthenium-based electrically conductive component, a lead-free glass having a glass basicity (Po value) of 0.4 to 0.9, and an organic vehicle; wherein, MSi2Al2O8 crystals (M: Ba and/or Sr) are present in a thick film resistor obtained by firing this composition. The ruthenium-based resistor composition is capable of forming a lead-free thick film resistor which eliminates harmful lead components from an electrically conductive component and glass, and has superior TCR characteristics, current noise characteristics, withstand voltage characteristics and stability after a heat cycling test over a wide resistance range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.